In fur-trapping country, Flint Mitchell depends on his single-shot rifle and his courage when he heads into Blackfoot territory with his fellow mountain men -- and with his new Blackfoot bride who may be the key to their safety.

The U.S. Cavalry knows that traveling the unmapped Arizona Territory canyons and trails in search of a woman kidnapped by Apaches could mean riding into a trap. So they request the help of Ward Kinman.